Pumping apparatus for oil-wells



(No Model.)

' F. M. KENNEDY.

PUMPING APPARATUS FOR OIL WELLS Patented. Nov. 16, 1897.

WITNESSES 15M m mvrbn ATTORNEYS- UNITED STATES PATENT OFFICE.

FRANK M. KENNEDY, OF OELINA, OHIO, ASSIGNOR OF ONE-HALF TO JANE W. STONE, OF BROOKLYN, NEW YORK.

PUMPING APPARATUS FOR OIL-WELLS.

SPECIFICATION forming part of Letters Patent No. 593,586, dated November 16, 1897.

Application filed March 3,1897. serial No. 626,833. (No model.)

To all whom it may concern.-

Be it known that I, FRANK M. KENNEDY, a citizen of the United States, residing at Oelina, in the county of Mercer, in the State of Ohio, have invented certain new and useful Improvements in Pumping Apparatus for Oil-Wells; and I do hereby declare that the following is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to improvements in pumping apparatus for oil-wells.

It is well known that a desideratum in oilwell pumping apparatus is some means for securing the polish-rod in a perfect vertical alinement throughout its travel; that the common method of operating the polish-rod is by a working beam or bell-crank lever on a fixed fulcrum, whereby the upper end of said rod unavoidably describes an arc of a circle, thereby causing a swaying of the said rod and a strain and wear upon the packing and stuffing box frame; that a common and usual method of seeking to overcome this swaying of the polish-rodis by increasing the size of the working parts, which while increasing the size of the said are also in: creases the vibration of the supportingframe, thereby seriously interferingwith the speed at which the pump-rod can be operated. It is also well known that the common mode of securing the pumping-frame to the well-casing is by clamping or otherwise securing the lower end of the tripod or supporting-frame to the diametric gas pipes which are commonly fixed in the casinghead,whereby the base of the pumping-frame is not adjustable thereon, and the continuous vibration of the said frame soon loosens and deranges the said pipes in the said casing-head.

The object, therefore, of my invention is twofoldfirst, to provide an improved means for keeping the polish-rod at all times in per fect alinement throughout its movement regardless of the length of the stroke, and, second, to provide an improved means for adjustably Securing the pumping-frame to the well-casing in such a manner as to relieve the said gas-pipes of all strain or vibration.

The novel features of my invention conof the cross-head, showing the wrist-pin on which the bell-crank pumping-lever is fulcrumed. Fig. 5 is a modified arrangement of-the bell-crank fulcrum.

The well-casing 1, of well-understood construction and arrangement, has upon its upper and outer end a proper casing 2, of common form, secured thereon by a screw-threaded connection, as usual. On the top of said head 2 is loosely mounted the adjustable attachment 6, which has a central opening for the welltubing 3 and is rigidly secured in position by the set-screws 7, preferably four in number.

While the mere form or contour of attachment 6 is immaterial, I prefer theannular form shown in Fig. 3, having a pendent annular flange 9,'in which the said set-screws are mounted, and provided upon theupper edge with an annular horizontal flange 10, adapted to support the said attachment upon the said casing-head. At or near the inner edge of said flange 10 are arranged the integral diametric upright lugs 8, laterally perforated, as shown. To these lugs the lower end of the tripod pumping-frame is rigidly bolted,and thus relieves the radially-arranged gas-pipes 11 and 12 of all strain or vibration. The said annular attachment 6 thus constructed can be adjusted at pleasure upon the head 2. The tubing 3 is extended, as usual, a proper distance above the top of said head 2 and is capped by a proper stuffing-box 4, in

which and in said tubing is loosely mounted the polish-rod 5, connected, as usual, with the pump-rod. (Not shown.)

\ to the said lugs 8, a pair of horizontal parallel guide-bars 14, having their opposite ends rig-- idly connected and laterally braced by the cross-rods 20 and 21, whose-reduced ends are mounted in suitable perforations and secured there by proper holding-nuts, and a pair of oblique parallel braces 15, having their upper ends perforated to receive the reduced ends of the said rod 21 and having their lower ends perforated to receive the same bolts by which the said standards 13 are secured to.

said lugs 8. The oblique brace 16, preferably formed of a single piece of tubing, is folded upon-itself, with its sides in approximate parallel arrangement and having their ends laterally apertured and pivotally mounted upon the reduced ends of said rod 21.

The reciprocating cross-head is formed of. the cross-head. blocks 23, having a diametric slot 25 upon their outer faces, adapted to loosely receive the said guide-bars, respectively, and having a reduced inner extension by which they are rigidly secured to the shaft 24, whose opposite ends are flush with the bottom of the saidslots 25. On the said shaft or wrist-pin and between the said cross-head blocks is loosely mounted the sleeve 22, to which are properly secured the adjacent ends of the parallel lever-arms 16 and the parallel lever-arms 17 of the bell-crank lever by which the said polish-rod is actuated. The outer ends of the said levers are rigidly connected and braced by the parallel brace-bars 13,wl1ose ends are properly bolted to the respective ends ofsaid levers. Between the extended ends of the said levers 16 is properly swiveled a sleeve 26, in which the upper end of the said polish-rod is rigidly fixed by means of the rigid collars 27 upon both sides of said sleeves. To the extendedends of the said levers 17 is properly secured the power-rod. (Not shown.) On the opposite ends of'bolt 28, which connects the upper ends of the standards 13 to the guide-bars 1 1, are pivotally mounted the forward ends of the bent compensating-lever arms 19, whose rear ends arepivotally connected to said levers 16 at a point midway the ends thereof, Fig. 1, by proper pivots, whereby the reciprocating movements ofthe powerrod will cause a corresponding reciprocating movement upon said guide-bars of the said.

cross-head, limited and regulated in its reciprocation by the said compensating-lever arms 19, whereby the said sleeve 26, carrying the upper end of said polish-rod, will at all times be in perfect vertical alinement with the pump-rod regardless of the length of the strike. It is obvious that various means or substitutes for the said compensating-lever arms 19 can readily be devised without departing from the spirit and scope of my invention, which consists in a pivotally-mount-- ed bell-crank lever so arranged as to positively direct and control the polish-rod or pump-rod. in. true vertical alinement throughout its line of travel instead of the crosshead blocks 23, Fig. 5, having their upper ends mounted on the respective ends of the said wrist-pin 24 and having their lower ends pivotally fulcrumed on proper bolts in suitable perforationsin the upper portion of the said braces 15.

Theoperation of my improvement thus described is, briefly stated, as follows: The operator first mounts the attachment 6 upon the casing-head in any desired adjustment and then rigidly secures it in such position by proper set-screws. The supporting-frame is then bolted to the supporting-lugs 8, and the lower end of the said brace 16 is rigidly secured to the floor in the usual or other proper manner. The vibration of the pumping-frame will thus have no tendency to loosenor derange the said gas-pipes in their fixed position in the casing-head. As the fulcrum of the bell-crank lever has a reciprocating horizontal movement on the said guide-bars, limited and regulated by the compensating-lever arms 19, which in their movement describe an arc of a circle whose center would be the pivots 2S, diametric to the said polish-rod5 and to the said sleeve 26, to which the upper forward end of the bell-crank lever ispivoted, it follows that the said polish-rod will be retained in perfect verticalalinement with the pump-rod throughout the limit of its movement. v

Having thus described my invention and the manner of employing the same, what I desire to secure by Letters Patent,is

The combination in a pumping apparatus for oil-wells, of an upright supporting-frame;

a bell-crank lever pivotally fulcrumed on said frame having one end thereof operatively connected with the polish-rod and provided Witnesses:

AUGUSTUS A. CHAPIN, KATHERINE CHAPIN. 

